This adapter is the original from Volkswagen and necessary for the following vehicles: VW Golf/Vento > 1993/1994, Audi 80/90/Coupé/Cabriolet, Audi 100/A6/S6 > 1997, Audi Coupé S2, Audi S4/S6 > 1997, VW Polo > 1994, VW Corrado/Passat >1993, VW Van T4 > 1995, Seat Toledo > 1999, VW LT >1997.